US1461356A - Color transparency - Google Patents

Description

E July-{10, 1923. met-35a- F I W. V. D. KELLEY I COLOR TRANSPARENCY Filed Au 2 1920 UUUE] UUUE] UUU U\ 1- VI/IIIII/IIII.

' coating on the other side,

Patented July 10, 1923..

EJNHT i WILLIAM v. D. KELLEY, or NEWARK, 1v

PORATED, or JERSEY CITY, NEW

* httifish aw JERSEY, ASSIGNOR 'ro PRIZMA, INCOR- JERSEY, A CORPORATION or MAINE.

COLOR TRANSPARENCY.

Application filed August 25, 1920. Serial No. 405,787.

T 0 all whom it may concern:

Be it known that IVILLIAM V. D. KELLEY, a citizen of the United States. and a resident of Newark, in the county of-Essex and State of New Jersey, has invented certain new and useful Improvement in Color Transparencies, of which the following is a specifi cation.

This invention relates to motion pictures in color and has for its object to provide a simplified process whereby colored pictures may-be produced from ordinary black and white value negatives as well as from color value negatives. i

It is found that very pleasing color effects can be produced by printing from a single negative at a single'operation .in both coatings of a multiple coating positive and then after development and fixing in the ordinary -manner applying one color to one coating and another color to the other coating. The resulting pictures do not substantially reproduce natural color, but do produce very pleasing effects, and are found especially useful for titles in natural color motion picture films as well as for toned effects in black and white films wherein the resultant'color subtractively producedby the different colors on the respective images. If the tone colors used are, for example, red and green, predominant red effects are producedby over-balancing either the printing of the image to be colored red, or the tone coloring bath, and likewise with green or Whatever colors'are used. It is found that ordinary double coated positive or transparent stock is admirably suited for this process because in a single printing operation from one side a relatively strong positive image will be produced in the coating adjacent-the negative, and a relatively weaker image in the giving suihcient opacity to produce approximations to black and sutiicient white to produce approximations to white with variations of intermediate colors, depending upon the amount of color fixed in the positive images. pleasing effects can also be obtained by leaving one image in black and coloring the other image with red, since in projection it is found that the'eve will supply partial sensations of green. resulting in a picture resembling a natural color picture in whites and blacks and intermediate colors, but not a true natural color picture because not made Very from color value images and not colored making color value negatives, and without employing the separate printing and complementary toning steps ordinarily required in producing natural color pictures.

The invention is shown diagrammatically in the accompanying drawing, wherein Figure l is a View of a negative. Figure 2 a single printing operation, Figure 3 a view of one side of the positive with the image colored red,

F i ure 4 the other side of the with the image colored green.

Figure 5 a section of the finished positive. Fig. 6 shows the printing method for an image containing an intermediateor gray portion, and

. Fig. 7 shows the print.

1 represents a tive having the image 2. 3 represents a secpositive tion of transparent stock having an emul-- sion 4 on one side and 5 on the other, to be printed'at a single operation, as shown in Figure 2, to produce the positive image 6 on one side, to be colored red, as shown in Figure 3, and the second positive image 7 on the other side, to be colored green, as shown in Figure In 6, 8 is an intermediate or gray portion of the negative. and in Fig. 7. 9 is .the positive of this portion colored red and lighter than the red section 6, while 10 is the print on the other side colored green, and lighter than the portion 7.

The effects to be produced vary according to the exposure and color, both of which can of course be regulated in manufacture. If overexposed and then over-colored. heavy black, or almost black, images result. but if properly exposed. the whites in the object come out white in the positive and the blacks come out substantially black. while intermediate colors vary between red and green, according to the intensity of coloring.

For coloring. the ordinary metallic toning baths can be used wherein the color is formed by a metallic precipitate. or the posiportion of an ordinary negative images can be bleached and dyed by acid or basic dyes in a known manner, or one image can be left in black and the other dyed or toned as with red, which in projection will appear to contain green, or colors containing green, although not in fact having any green therein.

By this invention a color transparency suitable for titles, backgrounds, scenery, portraits, etc., can be cheaply made from ordinary black and white or color value negatives and giving a much wider range of color, owing to the possibilit of using two colors than is possible with single color toned positives commonly used.

What I claim is 1. Process of making a color transparency consisting in printing from a single negative in one operation images in difi'erent layers images in different layers of multiple layer I positive, developing both images, and coloring said images in contrasting colors.

3. A double coated positive transparency having on each side a black and white value image, one of said images being colored in one color and the other in a contrasting color to produce a double toned black and white value color transparency.

Signed at Atlantic City in the county of Atlantic and State of New Jersey this 20th day of August A. D. 1920.

WILLIAM V. D. KELLEY.

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